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Introduction
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Publications
Publications (45)
Fractal properties of deep ocean current speed time series, measured at a single-point mooring on the Madeira Abyssal Plain at 1000- and 3000-m depth, are explored over the range between one week and 5 years, by using the detrended fluctuation analysis and multifractal detrended fluctuation analysis methodologies. The detrended fluctuation analysis...
Submarine volcanic eruptions took place at the island El Hierro (Canary Islands) between October 2011 and March 2012. The event produced plumes of discoloured waters due to the discharge of volcanic matter, magmatic gases, and hydrothermal fluids. The expelled materials, which behaved like oceanic tracers, were detected from the site of the volcano...
The intensity of the event was considered moderately turbid according to the kd490 and bb values. An assessment of 3 atmospheric corrections showed the SeaDAS standard MODIS algorithm to be the most suitable approach. Field data (low Chl-a reported over the advected plume) confirmed the failure of MODIS Chl-a algorithms for discolored waters. The a...
The combined use of data collected by multi-spectral radiometers, operating in the visible and infrared spectrum, and altimeter radars, operating in the microwave spectrum, allowed the detailed assessment of oceanic mesoscale dynamics in the Canary Islands area. Island-induced eddies are recurrent oceanographic structures of the region and contribu...
Del 18 al 29 de octubre de 2010 se llevó a cabo la campaña oceanográfica PROMECA en la parte occidental de la Cuenca Canaria con en el buque oceanográfico García del Cid, figura 1. Uno de los objetivos principales del proyecto se centra en el estudio del sistema de afloramiento noroccidental africano en la región de Cabo Ghir. En dicha región se re...
During the year 2008, using the commercial passenger ship Volcán
de Tauce of the Naviera Armas company several months, it was possible to
obtain vertical profiles of temperature from expandable bathythermograph
probes in eight stations across the Tenerife - La Gomera channel. With
these data of temperature we have been estimated vertical sections o...
An oceanographic survey was carried out from 18 to 29 October 2010 in
the Canary Basin (PROMECA project). Near Cape Ghir, in the Northwest
Africa coastal upwelling, 17 CTD casts were made to obtain continuous
records of conductivity and temperature with depth, and to collect
waters samples for nutrients analyses. Additionally, free-fall
turbulence...
1.1. Introducción 1.2. Ventajas y limitaciones de la teledetección oceanográfica 1.3. Desarrollo histórico 1.4. Espectro electromagnético y magnitudes radiométricas básicas 1.4.1. El espectro electromagnético 1.4.2. Parámetros oceanográficos básicos que se miden desde el espacio 1.4.3. Magnitudes radiométricas básicas 1.4.4. Atenuación de la radiac...
The Canary waters area is highly complex from an oceanographic point of view. It has been partially studied and different aspects of its surface dynamics remain unknown for a large rank of spatial and temporal scales. The main purpose of our future work using MetOp data is to advance in the knowledge of the ocean surface dynamics in this region usi...
Eddies generated by the Canary Current south of Canary Islands when the flow passes through the archipelago define a high mesoscale variability of the sea level downstream of the islands. Evidence of zonal propagation of perturbations of sea surface heights was observed by generating longitude-time plots. Hovmoeller diagrams of the altimetric data...
Eddies generated by the Canary Current south of Canary Islands when the flow passes through the archipelago define a high mesoscale variability of the sea level downstream of the islands. Evidence of zonal propagation of perturbations of sea surface heights was observed by generating longitude-time plots. Hovmoeller diagrams of the altimetric data...
This work reveals that the number and strength of Canary Island mesoscale eddies is higher during the second semester of 1998 year and it is dominated by long lived (>6 months) and big size (>150 km) anticyclonic eddies, propagating westward hundreds of kilometers (>500 km) from the place they were generated. This prevalence of anticyclones could b...
The main purposes of this paper are to identify and evaluate the oceanic mesoscale features that appear in the Atlantic Ocean eastern boundary, 20-40° N, 19-9° W, using ERS-1 (1992-1993) satellite altimeter data. The sea surface height anomalies and the eddy kinetic energy fields are calculated. High energy values, between 0.03 and 0.05 m 2 s -2, a...
En este trabajo se presentan algunos resultados obtenidos del análisis de la variabilidad de la altura de la superficie del mar a partir de las anomalías del nivel del mar proporcionadas por los datos del altímetro a bordo del satélite ERS-2. La finalidad del estudio has sido la determinación de la variación estacional que las estructuras oceanográ...
The Northwest African Coastal Transition Zone (NACTZ) is a region
with a high mesoscale activity characterised by cyclonic and
anticyclonic eddies, and filaments associated with the Northwest African
upwelling system. This work is focused mainly in the filaments observed
in satellite images around Cape Jubi and Cape Bojador. The intensity and
persi...
The Canary archipelago acts as a barrier of about 500 km for the
Canary Current, which flows along the north-west coast of Africa
boundary, associated with the north-west African upwelling. As a
consequence, this region is characterised by a large mesoscale turbulent
activity. This paper deals with the effects of the most pronounced
topographic fea...
The preliminary results of ocean circulations in the Canary Islands area, obtained through laboratory simulations, were discussed. Large oil tanker spills accidents had demonstrated the particular susceptibility of the coastel environment to oil spills. Numerical models were developed by several authors to simulate the evolution of oil spills in th...
The transition zone between coastal and oceanic waters
corresponding to eastern boundary currents is characterized by high
mesoscale variability. Associated with this have been observed recurrent
and persistent oceanographic features that appear in certain places. In
the Canary Upwelling Region studied in this work it has been observed
large cyclon...
The transition zone between coastal and oceanic waters corresponding to eastern boundary currents is characterized by high mesoscale variability. Associated with this have been observed recurrent and persistent oceanographic features that appear in certain places. In the Canary Upwelling Region studied in this work it has been observed large cyclon...
Like all the major upwelling regions, the Canary Current is characterised by intense mesoscale structure in the transition zone between the cool, nutrient-rich waters of the coastal upwelling regime and the warmer, oligotrophic waters of the open ocean. The Canary Island archipelago, which straddles the transition, introduces a second source of var...
En el presente estudio, una serie de pares de imágenes consecutivas del sensor Advance Very High Resolution Radiometer separadas entre si 24 horas son utilizadas con el objetivo de deducir velocidades de flujo superficial en el área del afloramiento del NW de África. El método utilizado es el método de las correlaciones cruzadas bidimensionales ent...
Particle organic carbon flux from the shelf to oceanic waters during upwelling between 19°N and 25°N off Mauritania has been analyzed using coastal zone color scanner (CZCS) imagery. Biomass in the giant filament has been estimated using surface pigment concentration registered by CZCS during time series in December 1983, March 1984, and October 19...
Este trabajo presenta el análisis de los efectos de las irregularidades de la línea de costa y la batimetría de la platafoffi1a costera africana, así como la presencia de las Islas Canarias, sobre la denominada Corriente de Canarias, en la región comprendida entre 24° N y 30° N de latitud y 12° O y 19° O de longitud. Haciendo uso de los resultados...
El objetivo que se plantea en este trabajo es el desarrollo de métodos cuantitativos que permitan extraer información nueva o complementaria deducida de parámetros geofísicos primarios obtenidos de las imágenes de satélite, empleando métodos que utilizan secuencias de imágenes consecutivas, para caracterizar mejor la variabilidad mesoescalar del af...
Se presenta un producto de satélite optimizado para estudios de mesoescala, obtenido como una mejora de la imagen media. El producto optimizado como media que es, no ofrece una visión instantánea del medio, pero sin embargo es adecuado para el estudio en mesoescala de áreas marinas sometidas a condiciones de nubosidad persistente, ya que proporcion...
